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Finding the Fourth Proportional to 310,115.52, 428,164.80 and 238,363.20

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Solution

The fourth proportional to 310,115.52, 428,164.80 and 238,363.20 is: 329,099.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,115.52 : 428,164.80 = 238,363.20 : x
  2. Step 2: Convert to fraction form
    310,115.52/428,164.80 = 238,363.20/x
  3. Step 3: Cross multiply
    310,115.52x = 428,164.80 × 238,363.20
  4. Step 4: Simplify right side
    310,115.52x = 102,058,731,855.36
  5. Step 5: Solve for x
    x = 102,058,731,855.36/310,115.52
  6. Step 6: Final answer
    x = 329,099.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.